<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./lib/vue.min.js"></script>
</head>
<body>
    <div id="app">
        <!-- v-if 和 v-else 的缺陷:只能切换两个组件 -->
        <login  v-if = "flag"></login>
        <register  v-else = "flag"></register>

        <a href="" @click.prevent = "flag = true">登录</a>
        <a href="" @click.prevent = "flag = false">注册</a>
    </div>
     
    <script>
        Vue.component('login', {
            template: '<h3>登录组件</h3>'
        })
        
        Vue.component('register', {
            template: '<h3>注册组件</h3>'
        })

        var vm = new Vue({
            el:"#app",
            data:{
                flag: false
            },
            methods: {}
        })
    </script>
</body>
</html>